At atmospheric pressure in the inlet pipe, the mass of air will take up more space and therefore move faster than it does in the pressurized charge pipes.
Since it is moving faster it will have a higher reynolds number and the boundary layer will be taller, making the tube effectively smaller and further increasing the velocity of the air in the inlet.
Originally Posted by Dennis_Grant
Remember this list: Bilstein; Penske; Koni; Ohlins; Sachs; Dynamic Suspension.
Not on this list? Almost certainly crap.